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  • A SEM image of the edge of a leaf shows a calcium oxalate crystal. These crystals are found throughout the plant and are responsible for throat irritation when medical marijuana is smoked. Plants that have too many oxalate crystals are good candidates for modern THC extraction techniques. Calcium oxalate crystals in plants are called raphides. Humans have similar calcium crystals that can appear as kidney stones. These crystals help remove calcium build up in the tissues and make it undesirable for grazing animals to eat the plant. Magnification is x120 on the printed page.
    K170406z056.jpg
  • Limelight also known as calcium light is a type of stage lighting once used in theaters.  A bright light is created when a sample of quicklime (calcium oxide). The light is produced by  incandescence.  The historic use of the light still services as someone in the public eye is still said to be ?in the limelight.? .Lime is produced by heating calcium carbonate until the extra carbon and oxygen atoms are driven off leaving just the calcium oxide.  This process is very easy and takes place in a lime kiln. Lime can be made from sea shells, chalk, and many types of rock - including marble.
    K12lime023.JPG
  • A seashell was heated in a lime kiln to convert the shell material into lime.  Limelight also known as calcium light is a type of stage lighting once used in theaters.  A bright light is created when a sample of quicklime (calcium oxide). The light is produced by  incandescence.  The historic use of the light still services as someone in the public eye is still said to be ?in the limelight.? .Lime is produced by heating calcium carbonate until the extra carbon and oxygen atoms are driven off leaving just the calcium oxide.  This process is very easy and takes place in a lime kiln. Lime can be made from sea shells, chalk, and many types of rock - including marble.
    K12lime007.JPG
  • Limelight also known as calcium light is a type of stage lighting once used in theaters.  A bright light is created when a sample of quicklime (calcium oxide). The light is produced by  incandescence.  The historic use of the light still services as someone in the public eye is still said to be ?in the limelight.? .Lime is produced by heating calcium carbonate until the extra carbon and oxygen atoms are driven off leaving just the calcium oxide.  This process is very easy and takes place in a lime kiln. Lime can be made from sea shells, chalk, and many types of rock - including marble.
    K12lime-chalk011.JPG
  • Marble ws heated in a lime kiln to convert teh mineral to lime.  This is the material used in a limelight lamp.  Limelight also known as calcium light is a type of stage lighting once used in theaters.  A bright light is created when a sample of quicklime (calcium oxide). The light is produced by  incandescence.  The historic use of the light still services as someone in the public eye is still said to be ?in the limelight.? .Lime is produced by heating calcium carbonate until the extra carbon and oxygen atoms are driven off leaving just the calcium oxide.  This process is very easy and takes place in a lime kiln. Lime can be made from sea shells, chalk, and many types of rock - including marble.
    K12lime-marble026.JPG
  • Marble ws heated in a lime kiln to convert teh mineral to lime.  This is the material used in a limelight lamp.  Limelight also known as calcium light is a type of stage lighting once used in theaters.  A bright light is created when a sample of quicklime (calcium oxide). The light is produced by  incandescence.  The historic use of the light still services as someone in the public eye is still said to be ?in the limelight.? .Lime is produced by heating calcium carbonate until the extra carbon and oxygen atoms are driven off leaving just the calcium oxide.  This process is very easy and takes place in a lime kiln. Lime can be made from sea shells, chalk, and many types of rock - including marble.
    K12lime-marble051.JPG
  • Marble ws heated in a lime kiln to convert teh mineral to lime.  This is the material used in a limelight lamp.  Limelight also known as calcium light is a type of stage lighting once used in theaters.  A bright light is created when a sample of quicklime (calcium oxide). The light is produced by  incandescence.  The historic use of the light still services as someone in the public eye is still said to be ?in the limelight.? .Lime is produced by heating calcium carbonate until the extra carbon and oxygen atoms are driven off leaving just the calcium oxide.  This process is very easy and takes place in a lime kiln. Lime can be made from sea shells, chalk, and many types of rock - including marble.
    K12lime-marble050.JPG
  • Limelight also known as calcium light is a type of stage lighting once used in theaters.  A bright light is created when a sample of quicklime (calcium oxide). The light is produced by  incandescence.  The historic use of the light still services as someone in the public eye is still said to be ?in the limelight.? .Lime is produced by heating calcium carbonate until the extra carbon and oxygen atoms are driven off leaving just the calcium oxide.  This process is very easy and takes place in a lime kiln. Lime can be made from sea shells, chalk, and many types of rock - including marble.
    K12lime-chalk013.JPG
  • Limelight also known as calcium light is a type of stage lighting once used in theaters.  A bright light is created when a sample of quicklime (calcium oxide). The light is produced by  incandescence.  The historic use of the light still services as someone in the public eye is still said to be ?in the limelight.? .Lime is produced by heating calcium carbonate until the extra carbon and oxygen atoms are driven off leaving just the calcium oxide.  This process is very easy and takes place in a lime kiln. Lime can be made from sea shells, chalk, and many types of rock - including marble.
    K12lime024.JPG
  • Limelight also known as calcium light is a type of stage lighting once used in theaters.  A bright light is created when a sample of quicklime (calcium oxide). The light is produced by  incandescence.  The historic use of the light still services as someone in the public eye is still said to be ?in the limelight.? .Lime is produced by heating calcium carbonate until the extra carbon and oxygen atoms are driven off leaving just the calcium oxide.  This process is very easy and takes place in a lime kiln. Lime can be made from sea shells, chalk, and many types of rock - including marble.
    K12lime020.JPG
  • A seashell was heated in a lime kiln to convert the shell material into lime.  Limelight also known as calcium light is a type of stage lighting once used in theaters.  A bright light is created when a sample of quicklime (calcium oxide). The light is produced by  incandescence.  The historic use of the light still services as someone in the public eye is still said to be ?in the limelight.? .Lime is produced by heating calcium carbonate until the extra carbon and oxygen atoms are driven off leaving just the calcium oxide.  This process is very easy and takes place in a lime kiln. Lime can be made from sea shells, chalk, and many types of rock - including marble.
    K12lime003.JPG
  • Seashells were heated in a lime kiln to convert the shell material into lime.  Limelight also known as calcium light is a type of stage lighting once used in theaters.  A bright light is created when a sample of quicklime (calcium oxide). The light is produced by  incandescence.  The historic use of the light still services as someone in the public eye is still said to be ?in the limelight.? .Lime is produced by heating calcium carbonate until the extra carbon and oxygen atoms are driven off leaving just the calcium oxide.  This process is very easy and takes place in a lime kiln. Lime can be made from sea shells, chalk, and many types of rock - including marble.
    K12lime006.JPG
  • Limelight also known as calcium light is a type of stage lighting once used in theaters.  A bright light is created when a sample of quicklime (calcium oxide). The light is produced by  incandescence.  The historic use of the light still services as someone in the public eye is still said to be ?in the limelight.? .Lime is produced by heating calcium carbonate until the extra carbon and oxygen atoms are driven off leaving just the calcium oxide.  This process is very easy and takes place in a lime kiln. Lime can be made from sea shells, chalk, and many types of rock - including marble.
    K12lime-chalk012.JPG
  • A light microscope image of the epidermal layer of a cactus (unidentified) showing  numerous calcium oxalate crystals.  Calcium oxalate crystals in plants are called raphides, in humans they can appear as kidney stones. These crystals help remove calcium build up in the tissues and make it undesirable for herbivore animals to eat the plant.Photo taken at 20x.
    K14-oxalatextal72.jpg
  • A light microscope image of the epidermal layer of a cactus (unidentified) showing  numerous calcium oxalate crystals.  Calcium oxalate crystals in plants are called raphides, in humans they can appear as kidney stones. These crystals help remove calcium build up in the tissues and make it undesirable for herbivore animals to eat the plant.Photo taken at 40x.
    K14-oxalatextal71.jpg
  • Gypsum. Polarized light micrograph of a thin section of gypsum. Gypsum is a chemical sedimentary rock, composed mainly of hydrated calcium sulphate. It may grow as a crystal aggregate (as here) or in giant tabular crystals up to 1 meter in length. Gypsum is used in plaster of Paris, in Portland cement and as a flux in pottery. The most compact form of gypsum is known as alabaster. Sample collected in Penfield, New York.  Object size: 40 mm.
    K17pol-gypsum_4697.jpg
  • Gypsum. Polarized light micrograph of a thin section of gypsum. Gypsum is a chemical sedimentary rock, composed mainly of hydrated calcium sulphate. It may grow as a crystal aggregate (as here) or in giant tabular crystals up to 1 meter in length. Gypsum is used in plaster of Paris, in Portland cement and as a flux in pottery. The most compact form of gypsum is known as alabaster. Sample collected in Penfield, New York.  Object size: 40 mm.
    K17pol-gypsum_4700.jpg
  • Fragment of an Abalone shell; color enhanced scanning electron micrograph (SEM) of a section through an abalone (Haliotis sp.) shell. The shell is composed of layers of overlapping platelets of calcium carbonate crystals, or aragonite,  Between the layers are thin sheets of protein (not seen). This structure makes the shell much stronger than the materials would be in any other arrangement.  Abalones are edible mollusks found in warm seas. The thin layers of shell reflect light using the wave nature of light.  Each thin layer reflects a particular wavelength – together the layers reflect wavelengths of light that constructively interfere to create bright greens and blues. Magnification: x8000 when printed at 10 cm wide.
    K14SEM140611abalone_0054B.jpg
  • Fragment of an Abalone shell; color enhanced scanning electron micrograph (SEM) of a section through an abalone (Haliotis sp.) shell. The shell is composed of layers of overlapping platelets of calcium carbonate crystals, or aragonite,  Between the layers are thin sheets of protein (not seen). This structure makes the shell much stronger than the materials would be in any other arrangement.  Abalones are edible mollusks found in warm seas. The thin layers of shell reflect light using the wave nature of light.  Each thin layer reflects a particular wavelength – together the layers reflect wavelengths of light that constructively interfere to create bright greens and blues. Magnification: x8000 when printed at 10 cm wide.
    K14SEM140611abalone_0054.jpg
  • Gypsum. Polarized light micrograph of a thin section of gypsum. Gypsum is a chemical sedimentary rock, composed mainly of hydrated calcium sulphate. It may grow as a crystal aggregate (as here) or in giant tabular crystals up to 1 meter in length. Gypsum is used in plaster of Paris, in Portland cement and as a flux in pottery. The most compact form of gypsum is known as alabaster. Sample collected in Penfield, New York.  Object size: 40 mm.
    K17pol-gypsum_4704.jpg
  • Fragment of an Abalone shell; color enhanced scanning electron micrograph (SEM) of a section through an abalone (Haliotis sp.) shell. The shell is composed of layers of overlapping platelets of calcium carbonate crystals, or aragonite,  Between the layers are thin sheets of protein (not seen). This structure makes the shell much stronger than the materials would be in any other arrangement.  Abalones are edible mollusks found in warm seas. The thin layers of shell reflect light using the wave nature of light.  Each thin layer reflects a particular wavelength – together the layers reflect wavelengths of light that constructively interfere to create bright greens and blues. Magnification: x1000 when printed at 10 cm wide.
    K14SEMabalone0039.jpg
  • Fragment of an Abalone shell; color enhanced scanning electron micrograph (SEM) of a section through an abalone (Haliotis sp.) shell. The shell is composed of layers of overlapping platelets of calcium carbonate crystals, or aragonite,  Between the layers are thin sheets of protein (not seen). This structure makes the shell much stronger than the materials would be in any other arrangement.  Abalones are edible mollusks found in warm seas. The thin layers of shell reflect light using the wave nature of light.  Each thin layer reflects a particular wavelength – together the layers reflect wavelengths of x4000 when printed at 10 cm wide.
    K14SEM140611abalone_0061.jpg
  • Scanning electron microscope image of a Blue mussel (Mytilus edulis) shell.  Colored scanning electron micrograph (SEM). The shell of a mollusc is a tough exoskeleton formed from calcium carbonate (aragonite or calcite). It evolved as a protective barrier to predators. Magnification: 3,740x and the image is 30 um wide.
    K12sem-bluemusselA.jpg
  • An Sem image of blue cheese, the blue color and flavor of the cheese is due to the Penicillin fungus.  It is made from cow's milk using the mould Penicillin to produce the blue-green marbling. Cheese is a good source of calcium, but contains high levels of fat.  This is a false color scanning electron microscope image.   The image was collected at 1,000x magnification and the length bar at the bottom of the image is 20 um.
    K07SEMbluecheese5.jpg
  • An Sem image of blue cheese, the blue color and flavor of the cheese is due to the Penicillin fungus.  It is made from cow's milk using the mould Penicillin to produce the blue-green marbling. Cheese is a good source of calcium, but contains high levels of fat.  This is a false color scanning electron microscope image.   The image was collected at 1,000x magnification and the length bar at the bottom of the image is 20 um.
    K07SEMbluecheese1.jpg
  • An X-ray of a Chambered Nautilus (Nautilus pompilius).
    nautilus1FC.jpg
  • willemite photographed in short wave uv light.  Calcite (red), willemite (green) and franklinite (black) from New Jersey, photographed under short-wave ultraviolet light.  Part of a series of the specimen in different lights.
    K12-willemite3998.jpg
  • Crystals in the roots of the Cannabis plant. The exact composition of these are currently unknown and their role in the life cycle of the plant is a mystery. Why are they there? What do they do? What is the chemical composition of the crystals? Just a few of the questions that seem to be a daily occurrence when looking at the cannabis plant with this level of magnification.<br />
Magnification on the printed page is 4300x at 9 inches wide.
    K170614Root-crystalscombo.jpg
  • Crystals in the roots of the Cannabis plant. The exact composition of these are currently unknown and their role in the life cycle of the plant is a mystery. Why are they there? What do they do? What is the chemical composition of the crystals? Just a few of the questions that seem to be a daily occurrence when looking at the cannabis plant with this level of magnification.<br />
Magnification on the printed page is 4300x at 9 inches wide.
    170614Root-crystalscombo.jpg
  • Willemite photographed in lwhite light.  Calcite, willemite and franklinite (black) from New Jersey.  Part of a series of the specimen in different lights.
    K12-willemite3993.jpg
  • Calcite (red), willemite (green) and franklinite (black) from New Jersey, photographed under short-wave ultraviolet light.  Part of a series of the specimen in different lights.
    K12-UVroc8696.jpg
  • Calcite (red), willemite (green) and franklinite (black) from New Jersey, photographed under short-wave ultraviolet light.  Part of a series of the specimen in different lights.
    K12-UVroc3983.JPG
  • willemite photographed in short wave uv light on the laft and white light on teh right - the two images are digitaly combined.  Calcite (red), willemite (green) and franklinite (black) from New Jersey, photographed under short-wave ultraviolet light.  Part of a series of the specimen in different lights.
    K12-willemite3998combo.jpg
  • Calcite , willemite  and franklinite  from New Jersey, photographed in visible light.  Part of a series of the specimen in different lights.
    K12-UVroc3981.JPG
  • willemite photographed in long wave uv light.  Calcite (red), willemite (green) and franklinite (black) from New Jersey, photographed under long-wave ultraviolet light.  Part of a series of the specimen in different lights.
    K12-willemite3996.jpg
  • Calcite , willemite  and franklinite (black) from New Jersey, photographed under white light.  Part of a series of the specimen in different lights.
    K12-UVroc8694.jpg
  • Crack in human tooth enamel. Colored scanning electron micrograph (SEM).   The enamel is the outer covering of the crown (visible part) of the tooth. It is the hardest substance in the human body.
    KW07-toothcolor1.jpg
  • A false color SEM image of a Calcium oxalate crystal.  Even a small dose of calcium oxalate is enough to cause intense sensations of burning in the mouth and throat.  Commonly found in popular houseplants, such as Dumbcane, the crystals effects or symptoms may last for a week or more, making calcium oxalate crystals a non-desirable ingredient in medicinal cannabis.  It is surprising that calcium oxalate is rarely discussed in literature about medical marijuana (cannabis).  There crystals are fairly common in plants, as they make it hard for grazing animals to eat the plant. Image is 70 um wide.
    K13SEM-pot-oxalate02.jpg
  • A false color SEM image of a Calcium oxalate crystal.  Even a small dose of calcium oxalate is enough to cause intense sensations of burning in the mouth and throat.  Commonly found in popular houseplants, such as Dumbcane, the crystals effects or symptoms may last for a week or more, making calcium oxalate crystals a non-desirable ingredient in medicinal cannabis.  It is surprising that calcium oxalate is rarely discussed in literature about medical marijuana (cannabis).  There crystals are fairly common in plants, as they make it hard for grazing animals to eat the plant. Image is 20 um wide.
    K13SEM-pot-oxalate01A.jpg
  • Fluorescent Coral in White Light. An image of Pectinia species coral in white light. This species of coral will grow brightly when illuminated in ultra-violet(UV) light.  Each head of coral is formed by a colony of genetically identical polyps which secrete a hard skeleton of calcium carbonate; this makes them important coral reef builders. This image is part of a series showing the identical specimen in white light and UV light..
    K12UVcorals001.jpg
  • An image of Acanthastrea lordhowensis coral in white light.  This species of coral will glow brightly when illuminated in ultra-violet(UV) light.  Each head of coral is formed by a colony of genetically identical polyps which secrete a hard skeleton of calcium carbonate; this makes them important coral reef builders. It is thought the glow may attract symbiotic algae, or protect the coral from the intense ultraviolet light of the Sun in shallow water. This image is part of a series showing the identical specimen in white light and UV light.
    K12UVcorals009.JPG
  • An image of Acanthastrea lordhowensis coral in white light.  This species of coral will glow brightly when illuminated in ultra-violet(UV) light.  Each head of coral is formed by a colony of genetically identical polyps which secrete a hard skeleton of calcium carbonate; this makes them important coral reef builders. It is thought the glow may attract symbiotic algae, or protect the coral from the intense ultraviolet light of the Sun in shallow water. This image is part of a series showing the identical specimen in white light and UV light.
    K12UVcorals008.JPG
  • An image of Acanthastrea lordhowensis coral in Long wave UV Light showing orange Fluorescence.  This species of coral will glow brightly when illuminated in ultra-violet(UV) light.  Each head of coral is formed by a colony of genetically identical polyps which secrete a hard skeleton of calcium carbonate; this makes them important coral reef builders. It is thought the glow may attract symbiotic algae, or protect the coral from the intense ultraviolet light of the Sun in shallow water. This image is part of a series showing the identical specimen in white light and UV light..
    K12UVcorals007.JPG
  • An image of Favites pentagona coral in Long wave UV Light showing green and orange Fluorescence.  This species of coral will glow brightly when illuminated in ultra-violet(UV) light.  Each head of coral is formed by a colony of genetically identical polyps which secrete a hard skeleton of calcium carbonate; this makes them important coral reef builders. It is thought the glow may attract symbiotic algae, or protect the coral from the intense ultraviolet light of the Sun in shallow water. This image is part of a series showing the identical specimen in white light and UV light.
    K12UVcorals006.JPG
  • An image of Favites pentagona coral in white Light.  This species of coral will glow brightly when illuminated in ultra-violet(UV) light.  Each head of coral is formed by a colony of genetically identical polyps which secrete a hard skeleton of calcium carbonate; this makes them important coral reef builders. It is thought the glow may attract symbiotic algae, or protect the coral from the intense ultraviolet light of the Sun in shallow water. This image is part of a series showing the identical specimen in white light and UV light.
    K12UVcorals005.JPG
  • Star sand is the  exoskeleton of foraminifers  found on beaches of the Indo-Pacific.  These are protozoa that belong to the Foraminifera family. The shell is made of calcium carbonate, when they die, their star shaped exoskeleton washes up on the beaches in enormous numbers. Magnification is 4x at 35mm..
    K11-starsand3926.JPG
  • Star sand is the  exoskeleton of foraminifers  found on beaches of the Indo-Pacific.  These are protozoa that belong to the Foraminifera family. The shell is made of calcium carbonate, when they die, their star shaped exoskeleton washes up on the beaches in enormous numbers. Magnification is 1.5x at 35mm..
    K11-starsand3907.JPG
  • An image of Pectinia species coral in Long wave UV Light showing green Fluorescence.  This species of coral will glow brightly when illuminated in ultra-violet(UV) light.  Each head of coral is formed by a colony of genetically identical polyps which secrete a hard skeleton of calcium carbonate; this makes them important coral reef builders. It is thought the glow may attract symbiotic algae, or protect the coral from the intense ultraviolet light of the Sun in shallow water. This image is part of a series showing the identical specimen in white light and UV light.
    K12UVcorals012.JPG
  • An image of Scolymia australis coral white Light.  This species of coral will glow brightly when illuminated in ultra-violet(UV) light.  Each head of coral is formed by a colony of genetically identical polyps which secrete a hard skeleton of calcium carbonate; this makes them important coral reef builders. It is thought the glow may attract symbiotic algae, or protect the coral from the intense ultraviolet light of the Sun in shallow water. This image is part of a series showing the identical specimen in white light and UV light.
    K12UVcorals004.JPG
  • An X-ray of two Pearl Strands.  The fake pearl strand is made from plastic and x-rays can easily pass through, while the real pearls are much denser to the x-rays and are shown at the bottom of the picture.  Real Pearls are accretions of nacre (calcium carbonate) secreted by certain oysters and mussels. The presence of a foreign body (such as a parasite or a grain of sand) within the shell triggers the secretion of nacre by the mollusk?s mantle. Thin layers are deposited on the irritant particle and, over several years, a pearl is formed.
    real-fake-pearlblue.jpg
  • Hornblende crystals, polarized light micrograph. This mineral contains calcium, sodium, magnesium, iron and aluminum in a silicate matrix. It is a member of the amphibole group of minerals, and it is found in igneous and metamorphic rocks. The area here is less than half a centimeter wide.
    K17-Hornblende01.jpg
  • Fluorescent Coral in White and UV Light. An image of Pectinia species coral in white light. This species of coral will grow brightly when illuminated in ultra-violet(UV) light.  Each head of coral is formed by a colony of genetically identical polyps which secrete a hard skeleton of calcium carbonate; this makes them important coral reef builders. This image is part of a series showing the identical specimen in white light and UV light..
    K12UVcorals011.JPG
  • Fluorescent Coral in White Light. An image of Pectinia species coral in white light. This species of coral will grow brightly when illuminated in ultra-violet(UV) light.  Each head of coral is formed by a colony of genetically identical polyps which secrete a hard skeleton of calcium carbonate; this makes them important coral reef builders. This image is part of a series showing the identical specimen in white light and UV light..
    K12UVcorals010.JPG
  • Fluorescent Coral in White Light. An image of Pectinia species coral in white light. This species of coral will grow brightly when illuminated in ultra-violet(UV) light.  Each head of coral is formed by a colony of genetically identical polyps which secrete a hard skeleton of calcium carbonate; this makes them important coral reef builders. This image is part of a series showing the identical specimen in white light and UV light..
    K12UVcorals003.JPG
  • An image of Pectinia species coral in Long wave UV Light showing green Fluorescence.  This species of coral will glow brightly when illuminated in ultra-violet(UV) light.  Each head of coral is formed by a colony of genetically identical polyps which secrete a hard skeleton of calcium carbonate; this makes them important coral reef builders. This image is part of a series showing the identical specimen in white light and UV light.
    K12UVcorals002.jpg
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